植物学报
植物學報
식물학보
ACTA BOTANICA SINICA
2001年
2期
213-216
,共4页
脱落%生长素%免疫组织化学定位%紫丁香
脫落%生長素%免疫組織化學定位%紫丁香
탈락%생장소%면역조직화학정위%자정향
Freezing sections and immunogold-silver staining were employed tothe study on the localization of IAA in petioles of Syringa oblata Lind. At different stages of leaf abscission, the distribution patterns of the silver particles varied in different tissues. In the earlier period of abscission, there were many silver particles in the proximal and distal tissues, but only a few in the abscission zone. The high density of silver particles was found in the phloem of the petiole. The number of silver particles in the abscission zone increase immediately after the protective layer was formed and began to decrease along with the development of the abscission zone. The density of the silver particles became very low when abscission was completed. The formation of protective layer may be the demarcation line of the Stage Ⅰ and Stage Ⅱ during the development of the abscission zone.
